WO2012020119A1

WO2012020119A1 - Rear‑face connection of led modules

Info

Publication number: WO2012020119A1
Application number: PCT/EP2011/063927
Authority: WO
Inventors: Bernhard Wuppinger; Peter Prodell; Jochen Holzbauer
Original assignee: Siteco Beleuchtungstechnik Gmbh
Priority date: 2010-08-13
Filing date: 2011-08-12
Publication date: 2012-02-16
Also published as: EP2603957B1; DE102010034306A1; EP2603957A1

Abstract

The invention relates to a light module for connection to a light, wherein the light module has a circuit board with a population face, on which a plurality of LEDs and electrical conductor tracks for making electrical contact with the LEDs are arranged, wherein the board has at least one opening and a coupling piece of a plug connection is fixed to the board in the area of the opening, in which a mating coupling piece on the light side can engage from the rear face of the board opposite the population face, wherein the opening forms an electrical connection from the population face to the rear face of the board in order to supply the LEDs with electrical power from the rear face of the light module.

Description

Rear connection of LED modules

The invention relates to a luminaire module which has a plurality of LEDs arranged on a circuit board (light emitting diodes, which are also to be understood as meaning organic light emitting diodes). Furthermore, the invention relates to a luminaire which has one or more of these luminaire modules.

In the lighting technology is known to form lights with LEDs as bulbs in that a plurality of LEDs on modules, in particular on a common board, are arranged. The board usually has on the component side electrical connections, with which they can be connected to the power supply of the lamp. The effort to install these modules is relatively high. The assembly can be made usually only by a specialist, as lying on the board current-carrying lines are available. Furthermore, the laying of the connection cable is complicated, because the connecting cable must be laid over the occupied with LEDs component side of the board, which is located in the visible range of the lamp. Even if the connection cable is routed laterally on the board, it is often still visible from the outside and the wiring can only be made by a specialist.

Object of the present invention is to form lighting modules with LED assembly, which are easier to assemble and provide higher reliability.

The invention is achieved by a luminaire module for connection to a lamp, wherein the luminaire module has a board with a component side, on which a plurality of LEDs and electrical tracks for electrically contacting the LEDs are arranged, wherein the board has at least one opening and a coupling piece of a plug connection is fixedly mounted on the board in the region of the opening into which a light-side counter-coupling piece from the rear side facing the mounting side Board can engage, wherein an electrical connection from the component side to the back of the board is formed through the opening to supply the LEDs from the back of the lamp module with electrical power.

The invention makes use of the fact that the luminaire module on the component side, which points in the visible region of the luminaire, does not have to be contacted, but is contacted by the rear side. For this purpose, an opening in the board is provided to perform the electrical connection to the back. This makes it possible to avoid a complex and correspondingly expensive double-sided conductive board. Furthermore, it was recognized that the back-side contacting of the luminaire module brings about further advantages, which allow a simpler insulation of the component and an easier handling of the component.

According to a preferred embodiment, the coupling piece of the connector is mounted in the region of the opening on the component side on the board and engages from the component side through the opening. As a result, the electrical connections required for mounting the luminaire module are completely accessible from the rear. According to an alternative embodiment, a coupling piece of the plug-in connection in the region of the opening on the component side can also be mounted in such a way that a light-side counter-coupling piece can be passed through the opening for engagement in the coupling piece. In this case, although the module-side coupling does not protrude to the back of the board, yet the accessibility is guaranteed to the coupling piece from the back through the opening. The latter has the advantage that the back of the board is flat and thus it can be easily brought into contact with a heat sink.

According to a further preferred embodiment, the coupling piece is mounted in the region of the at least one opening on the back of the board and the electrical connection connects the coupling piece with the component side through the at least one opening. In this embodiment, the electrical connection is formed by a fixed wiring, while in the two preferred embodiments described above, the electrical connection is formed by the coupling piece or the counter-coupling piece. Also in this embodiment, it is not necessary that electrical conductor tracks are present on the back of the board. The electrical connection may be in the form of a hard wiring directly from the coupling piece through the opening be led to the component side and are only on the assembly side with electrical conductors in contact.

According to a preferred embodiment, the connector is adapted to mechanically hold the lamp module to the light. In this case, the luminaire modules only have to be plugged into the luminaire for installation. This is often still possible at the installation site of the luminaire. If necessary, this work can even be done by a non-expert. The installation of the luminaire modules is as simple as replacing a conventional luminaire in a luminaire.

According to a preferred Ausführangsform the board of the lamp module is designed to be conductive only on the component side. In contrast to circuit boards, which are conductive on two sides and have plated-through holes, the single-sided conductive circuit boards are much cheaper. Furthermore, they offer the advantage that no electrical contacts point to the rear of the luminaire module, so that this side does not require separate processing for the insulation of the luminaire module. The luminaire module can be easily formed on the back of a non-conductive surface of the board and therefore does not require a separate insulating layer or a separate housing for insulation.

According to a preferred embodiment, an insulation or a seal is arranged between the coupling piece and the board. For example, the coupling piece can be glued on the component side or the back by means of an adhesive. The adhesive may simultaneously have the function of an electrical insulation and / or a seal. This can prevent ingress of dust or moisture between the coupling and the board. This embodiment is particularly suitable in connection with the preferred embodiments described below, in which the board is provided at least on the conductive component side with an insulation, which may be dustproof and / or moisture-proof.

According to a preferred embodiment, the board on the component side is completely or partially covered with an electrical insulation. The insulation is preferably formed by a potting compound, in particular a transparent potting compound. at Using a transparent potting compound can pour the entire luminaire module including the LEDs. This is a particularly cost effective and efficient way to insulate the luminaire module. The insulation may be designed to be protected against electrostatic discharge (ESD). In this case, the installation of the lamp modules can even be made by a non-specialist.

According to a further embodiment, a seal may be provided on the side of the luminaire module opposite the component side, in particular on the rear side of the circuit board, which forms a seal against an adjacent component of the luminaire in the state of the luminaire module connected to the luminaire. By means of this seal, e.g. produce moisture-proof, splash-proof or jet-protected luminaires. When using sealing material in the connectors even higher degrees of protection of luminaires can be produced. Furthermore, the lamp modules can also be gas-tight and be connected in a gastight manner by means of the seal with the lamp. These luminaires are suitable for use in environments with explosive gases.

According to a preferred embodiment, the lighting module further comprises on the board resources for supplying the LEDs. In particular, a ballast or LED driver was placed on the board. According to a preferred embodiment, the resources are arranged on the component side of the board. These embodiments have the advantage that the replacement of defective equipment with the lamp module can take place. Furthermore, only the supply line for the LED modules must be accommodated on the lighting side.

According to a preferred embodiment, the luminaire module in the cross-sectional plane along the board is rectangular or square. This embodiment is particularly advantageous in lights in which a plurality of luminaire modules are inserted close together. With rectangular or square luminaire modules, for example, light strips with several successively and / or next to each other arranged light modules can be formed. An aspect of the invention further relates to a luminaire for lighting purposes, for example an indoor or outdoor luminaire, which comprises one or more of the previously described luminaire modules. For example, the luminaire may have a plurality of luminaire modules arranged one behind the other to form a band of light. The luminaire may in particular have a through-wiring, to which a plurality of counter-coupling pieces are connected one behind the other, into each of which a luminaire module can be inserted.

According to a further embodiment, the luminaire can also be designed as a single luminaire, in particular as a downlight. The downlight may be a luminaire module or a plurality of e.g. have symmetrically arranged lamp modules.

Other features and advantages of the present invention will become apparent from the following description of preferred embodiments. In the attached figures is / are

1 shows a cross section through a part of a luminaire with a luminaire module,

FIG. 2 shows a plan view of the luminaire module according to FIG. 1,

FIG. 3 shows a cross section through a luminaire module according to a further embodiment,

FIG. 4 shows an enlargement of a section of FIG. 3,

FIGS. 5a-5c are perspective views of three lights,

Figure 6 is a perspective view of a continuous line luminaire with a lamp module, and

Figures 7a-7b perspective views of two lamp modules. A luminaire module of the illustrated embodiments comprises a circuit board 2, which has a component side 4 and an opposite rear side 6. The board 2 is equipped on the component side 4 with a plurality of LEDs 8. On the assembly side 4 are further printed conductors (not shown in the figures), which contact the LEDs 8 electrically.

According to the illustrated embodiments, the board 4 is a single-sided conductive board, which is formed only on the component side 4, on which the LEDs 8 are arranged with electrical conductor tracks.

The circuit board 6 according to the luminaire module shown in Figures 1 and 2 further comprises an opening 10 which serves to form an electrical connection to the back 6 of the board. For this purpose, a coupling piece 12 of an electrical connector is mounted in the region of the opening 10 in electrical connection with the component side 4 or the conductor tracks provided thereon. The coupling piece 12 extends through the opening 10 to the back 6 of the board 2. On the back 6, a counter-coupling piece 14 provided on the light side can be brought into contact with the coupling piece 12. The counter-coupling piece 14 is fixedly provided on a housing portion 16 of the lamp. The plug connection is designed such that it has the necessary stability to mechanically hold the lamp module to the housing 16 of the lamp. Furthermore, the connector forms the only electrical contact with the lamp module. All electrical supply lines are transmitted through the plug connection to the luminaire module. At the counter-coupling piece 14, a connecting line 18 is attached, which is preferably already mounted in the manufacture of the lamp fixed to the lamp housing. The plug connection between the coupling piece 12 and the counter-coupling piece 14, however, is designed so that it can be easily connected by an installer on site during assembly of the lamp or during maintenance and released again.

In the illustrated embodiment of the lamp module according to Figures 1 and 2, a seal 18 is further provided on the back 6 of the board 2 to the coupling piece 12, which causes a dust and moisture-proof enclosure in the mounted state of the lamp module, so that no dust and moisture between the back 6 of the board and the adjacent portion of the lamp housing 16 can penetrate into the lamp. Insulation in the form of a transparent coating (eg of a transparent plastic resin) is also provided on the component side of the LED, which isolates all strip conductors and the connection of the coupling piece 12. The insulation serves to protect against contact during assembly, maintenance or cleaning of the luminaire. Furthermore, according to one embodiment, the insulation can also be made moisture-proof. Together with the seal 18 on the back of the board, the lamp module is therefore completely sealed against the environment. Such lights can be used for example in wet rooms. With a gas-tight seal such lights can be used in areas where there is an increased risk of accumulation of explosive gases.

Referring to Figures 3 and 4, an alternative embodiment of a lighting module is shown, wherein the same reference numerals as in Figures 1 and 2 have been used for corresponding elements. In this embodiment, a coupling piece 12 'is glued to the back of the board 2, wherein the adhesive simultaneously serves as a seal and therefore acts according to the seal 18 of the embodiment described above. The coupling piece 12 'has two metallic contact pins 13, which are passed through two openings 10' in the board 2 from the back 6 to the component side 4 and form according to this embodiment, the electrical connection from the back 6 to the component side 4 of the board. The contact pins 13 are connected only on the component side with electrical conductors (not shown in the figures) to allow the electrical supply of the LEDs 8. In the coupling piece 12 'can, as in the previously described embodiments in a counter-coupling piece 14, which is mounted on the light side, intervene.

In the figures 5 a to c three different embodiments of lights are disclosed, each having one, two or three lamp modules, as shown in Figures 3 and 4, have. The luminaire housing comprises a frame 17 which can accommodate the size of one, two or three luminaire modules with an exact fit. The luminaire modules are waterproof as described previously from the component side by a potting compound. Furthermore, a seal is provided in the connection between the coupling piece and the counter-coupling piece (not visible in FIGS. 5a to 5c), so that moisture can not enter through this plug-in connection as well. The luminaires according to the figures Ren 5a to 5c may be formed in particular as moisture-proof, with the encapsulation of the one or more lighting modules no further insulation, except for the cable insulation within the lamp, is necessary. According to an alternative embodiment of the moisture-proof luminaires, a transparent cover can also be provided on the housing frame 17 on the luminaire side above the luminaire module (s), which ensures, for example, a moisture-proof termination of the luminaire.

FIG. 6 shows a luminaire in the form of a continuous line luminaire. In this embodiment, a plurality of light modules (in Figure 6, only one light module is shown) inserted one behind the other. The luminaire is formed from a housing 16 'in the form of a longitudinally extending trough or mounting rail. Within the tub, approximately along the center line, there is a through-wiring 20 'which serves as a connection lead for the luminaire modules of this embodiment. On the through-wiring 20 'counter-coupling pieces 14 are arranged one behind the other preferably at regular intervals, in each of which a coupling piece of a lamp module can be inserted.

The lamp modules are held in the housing 16 solely by the connection between the coupling piece and the mating coupling piece.

FIGS. 7a and 7b show two further embodiments of luminaire modules. In the case of these luminaire modules, operating means in the form of LED drivers 21 are arranged on the component side. The resources may be arranged in different arrangements, e.g. along the center line or at one edge of the board 2, as exemplified in FIGS. 7a and 7b. These luminaire modules can be mounted in a luminaire that merely provides the power supply for the LED drivers. The complete electronics required for operating the LEDs 8 are integrated in the luminaire module.

Further embodiments of luminaire modules and associated luminaires, as defined in the following claims, are possible within the scope of the invention. For example, the luminaire can also be designed as a downlight, in which preferably only one luminaire module is provided. All shown embodiments each have only one coupling piece. Although this is preferred for the invention, however, a plurality of coupling pieces may be provided on a lamp module. Preferably, the at least one coupling piece is arranged on a center line of the board. There may also be provided a plurality of coupling pieces along a center line of the board. The size of the coupling pieces is much smaller relative to the boards, for example, the cross-sectional dimension of a coupling in the plane of the board is only less than 10% of the corresponding cross-sectional dimension of the board. This makes it possible to arrange a relatively large number of LEDs on the component side of the luminaire modules. In contrast to conventional bulbs, which are partially formed with LEDs, allow the light modules according to the present invention to form an insulation, without requiring a separate housing of the light module is required. The use of single-sided conductive circuit boards, it is not even necessary to provide the opposite side of the assembly side of the lighting module with a separate insulation.

List of reference numbers:

2 board

4 component side

6 back side

8 LEDs

10, 10 'opening

12, 12 'coupling piece

13 electrical pin

14, 14 'counter-coupling piece

16 housing

17 case frame

18 seal

20, 20 'connecting cable

21 LED drivers

Claims

claims

1. luminaire module for connection to a lamp, wherein the luminaire module has a circuit board with a component side (4) on which a plurality of LEDs (8) and electrical conductor tracks for electrically contacting the LEDs are arranged,

wherein the board (2) has at least one opening (10, 10 ') and a coupling piece (12, 12') of a plug connection to the board in the region of the opening is fixedly mounted, in which a light-side counter-coupling piece (14) of the component side opposite side (6) of the board (2) can engage, wherein through the opening (10) an electrical connection from the component side (4) to the back (6) of the board (2) is formed to the LEDs (8) of to supply the back of the luminaire module with electrical power.

2. Lamp module according to claim 1, wherein the coupling piece (12) in the region of the opening (10) on the component side (4) of the board (2) is mounted and from the component side (4) through the opening (10) engages around the electrical connection, or on the component side (4) is mounted such that the luminaire side counter-coupling piece (14) through the opening (10) can be passed for engagement in the coupling piece to form the electrical connection.

3. Luminaire according to claim 1, wherein the coupling piece (12 ') in the region of at least one opening (10') is mounted on the back of the board and the electrical connection connects the coupling piece with the Bestückungssetie through the at least one opening (10 '). ,

4. Lamp module according to claim 2 or 3, wherein the plug connection is adapted to hold the lamp module mechanically in the lamp.

5. Lamp module according to one of the preceding claims, wherein the circuit board (2) on one side only on the component side (4) is conductive.

6. Lamp module according to one of the preceding claims, wherein between the coupling piece (12, 12 ') and the circuit board (2) an insulation or a seal is arranged.

7. Lamp module according to one of the preceding claims, wherein the board (2) on the component side (4) is completely or partially covered with an electrical insulation.

8. Lamp module according to claim 7, wherein the insulation is formed by a potting compound, in particular by a transparent potting compound.

9. Lamp module according to one of the preceding claims, which is completely electrically isolated, such that it is protected against electrostatic discharge (ESD).

10. Luminaire module according to any preceding claim, wherein a seal on the mounting side (4) opposite side of the lamp module, in particular the board (2) is provided, which in the connected to the lamp state of the lamp module a seal against an adjacent component of the lamp forms.

11. Lamp module according to one of the preceding claims, which is moisture-proof, and / or gas-protected.

12. Lamp module according to one of the preceding claims, which is rectangular or square in the cross-sectional plane along the board (2).

13. Luminaire module according to one of the preceding claims, which further comprises means for supplying the LEDs (8), in particular one or more ballasts or LED driver (21), on the board (2).

14. Light having one or more lighting modules according to one of the preceding claims.

15. Luminaire according to claim 14, in which a plurality of lighting modules are arranged as a light band.

Luminaire according to claim 14 or 15, which has a through-wiring (20 ') to which a plurality of counter-coupling piece (14) are successively mounted, to which the lamp modules can be inserted.

17. Luminaire according to claim 14, which is designed as a single luminaire, in particular as a wet room luminaire or downlight.